- Emotion Al is transforming how emotional dynamics are integrated into consumer research and product design. By detecting and interpreting emotional cues from facial expressions, voice, and behaviour, it enables emotionally intelligent systems that move beyond conventional user interaction models. This chapter examines Emotion Al as both a methodological tool and a design principle, offering deeper insights into user sentiment and supporting the creation of hedonic experiences - what we term digital empathy. Grounded in established emotion theories and recent technological advances, the chapter explores cross-sector applications and reflects on the ethical implications surrounding the use of emotional data.2026/01/10